EP0949745A1 - Substrate for a subassembly of electronic components of an electric machine - Google Patents

Substrate for a subassembly of electronic components of an electric machine Download PDF

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Publication number
EP0949745A1
EP0949745A1 EP99400851A EP99400851A EP0949745A1 EP 0949745 A1 EP0949745 A1 EP 0949745A1 EP 99400851 A EP99400851 A EP 99400851A EP 99400851 A EP99400851 A EP 99400851A EP 0949745 A1 EP0949745 A1 EP 0949745A1
Authority
EP
European Patent Office
Prior art keywords
substrate
plastic
sub
assembly
electric machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99400851A
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German (de)
French (fr)
Other versions
EP0949745B1 (en
Inventor
Mathieu Van Den Bossche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Equipements Electriques Moteur SAS
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Valeo Equipements Electriques Moteur SAS
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Filing date
Publication date
Application filed by Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP0949745A1 publication Critical patent/EP0949745A1/en
Application granted granted Critical
Publication of EP0949745B1 publication Critical patent/EP0949745B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/301—Assembling printed circuits with electric components, e.g. with resistor by means of a mounting structure
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
    • H02K11/05—Rectifiers associated with casings, enclosures or brackets
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/325—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor

Definitions

  • the present invention relates to substrates for electronic component subassembly for machine electric.
  • a substrate for components diodes, transistors, circuit boards integrated circuits or hybrid circuits comprising one or more several metallic traces on which is molded an insulating plastic material.
  • Such a substrate is more particularly intended for regulating brush holders and diode bridges for vehicle alternators automobiles.
  • the power components are soldered or stuck on heatsinks allowing to evacuate calories by convection or conduction.
  • the lines of current or the potentials are done by metallic traces, for example from stamping, on which is overmolded the insulating plastic.
  • the choice of overmolding material corresponds to technical requests specific to subsequent use of the product in the application.
  • An object of the invention is to provide a substrate less expensive but ensuring a lasting fixation of the machine subassembly.
  • a substrate for a subset of electric machine having a receiving part an electronic component, made of plastic, and a part for fixing the substrate to the machine, made of plastic, in which the plastic materials of the receiving and fixing are different.
  • the fixing part may for example be a high-end plastic material with a good creep resistance for a durable fixation of the machine sub-assembly despite variations climatic conditions.
  • the receiving part may be a plastic material with mechanical characteristics medium. This last plastic material having a cost lower than the first, we lower the cost price substrate without harming mechanical performance.
  • a subset is also provided. for electric machine comprising a substrate according to the invention.
  • a machine is also provided. electric, in particular a vehicle alternator, comprising a sub-assembly according to the invention.
  • the subset of Figure 1 is a bridge rectifier or brush holder for alternator motor vehicle. More generally, it could be a sub-assembly comprising one or more components electronics such as diodes, transistors, printed circuit boards or circuits hybrids.
  • the sub-assembly 2 comprises a substrate 4 having a receiving part 6 of one or more electronic components 7 via a base 8.
  • the substrate 4 has a generally flat shape. he includes electrical conductors 10, here under the form of metallic traces, extending in thickness of the substrate 4 and connecting, by means of cables 12, the component 7 to a connector (not shown) of the sub-assembly.
  • a cover 14 covers the receiving part 6 of component 7 to isolate it from the outside.
  • the substrate 4 has fixing parts 16, such as legs, each having a conduit 18 extending along the thickness of the substrate 4. These parts 16 are intended to receive screws 20 for the fixing the substrate 4 to a support 22 belonging to a electric machine 24 such as an alternator vehicle.
  • the substrate 4 is produced by overmolding on the metallic traces 10 of a first plastic material defining the receiving part 6, and a second plastic, different from the first, defining the only fixing parts 16. Both plastics can be co-molded or molded one on the other successively.
  • the raw material an inexpensive material having average mechanical characteristics.
  • the second plastic material we choose a material high-end plastic such as polysulfide phenylene, having an excellent creep resistance. So, after tightening the screws 20, the fixing parts 16 are compressed between the screw heads and the support 22. Over time, this compression remains substantially unchanged despite variations climatic conditions, which ensures the long-term tightening of screw 20.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Metallurgy (AREA)
  • Synchronous Machinery (AREA)
  • Combinations Of Printed Boards (AREA)

Abstract

An electrical equipment sub-assembly substrate (4) has an electronic component reception part (6) and a substrate mounting part (16) made of different plastics. Independent claims are also included for the following: (i) an electrical equipment sub-assembly including the above substrate; and (ii) electrical equipment, especially a vehicle alternator, including the above sub-assembly.

Description

La présente invention concerne les substrats pour sous-ensemble à composant électronique pour machine électrique.The present invention relates to substrates for electronic component subassembly for machine electric.

On connaít un substrat pour composants électroniques de type diodes, transistors, plaquettes de circuits intégrés ou circuits hybrides comprenant une ou plusieurs traces métalliques sur lesquelles est surmoulé un matériau plastique isolant. Un tel substrat est plus particulièrement destiné à des porte-balais régulateurs et des ponts de diodes pour alternateurs de véhicules automobiles. Les composants de puissance sont brasés ou collés sur des dissipateurs permettant d'évacuer les calories par convection ou par conduction. Les lignes de courant ou les mises sous potentiel se font par les traces métalliques, issues par exemple de matriçage, sur lesquelles est surmoulée la matière plastique isolante. Le choix du matériau de surmoulage correspond à des demandes techniques propres à l'utilisation ultérieure du produit dans l'application. Une de ces demandes particulières est la tenue au fluage, c'est-à-dire la conservation d'une épaisseur mise en contrainte après des stress climatiques, ce qui permet par exemple de garantir un couple de desserrage entre une vis et un écrou. Pour répondre à ce besoin de tenue au fluage, on peut choisir une matière plastique haut de gamme présentant les caractéristiques mécaniques requises. Toutefois, une telle matière plastique est coûteuse, ce qui augmente le prix de revient du substrat.We know a substrate for components diodes, transistors, circuit boards integrated circuits or hybrid circuits comprising one or more several metallic traces on which is molded an insulating plastic material. Such a substrate is more particularly intended for regulating brush holders and diode bridges for vehicle alternators automobiles. The power components are soldered or stuck on heatsinks allowing to evacuate calories by convection or conduction. The lines of current or the potentials are done by metallic traces, for example from stamping, on which is overmolded the insulating plastic. The choice of overmolding material corresponds to technical requests specific to subsequent use of the product in the application. One of these requests particular is the creep resistance, that is to say the conservation of a thickness under stress after climatic stress, which allows for example to guarantee a loosening torque between a screw and a nut. To meet this need for creep resistance, we can choose a high-end plastic with the required mechanical characteristics. However, such plastic material is expensive, which which increases the cost price of the substrate.

Un but de l'invention est de fournir un substrat moins coûteux mais assurant une fixation durable du sous-ensemble à la machine.An object of the invention is to provide a substrate less expensive but ensuring a lasting fixation of the machine subassembly.

En vue de la réalisation de ce but, on prévoit selon l'invention un substrat pour un sous-ensemble de machine électrique, présentant une partie de réception d'un composant électronique, réalisée en matière plastique, et une partie de fixation du substrat à la machine, réalisée en matière plastique, dans lequel les matières plastiques des parties de réception et de fixation sont différentes.In order to achieve this goal, provision is made according to the invention a substrate for a subset of electric machine, having a receiving part an electronic component, made of plastic, and a part for fixing the substrate to the machine, made of plastic, in which the plastic materials of the receiving and fixing are different.

Ainsi, on peut choisir les deux matières plastiques pour les adapter le mieux possible aux parties respectives. La partie de fixation pourra par exemple être une matière plastique haut de gamme présentant une bonne tenue au fluage en vue d'une fixation durable du sous-ensemble à la machine en dépit de variations climatiques. La partie de réception pourra être une matière plastique ayant des caractéristiques mécaniques moyennes. Cette dernière matière plastique ayant un coût plus bas que la première, on abaisse le prix de revient du substrat sans nuire aux performances mécaniques.So we can choose the two plastics to adapt them as best as possible to the parties respective. The fixing part may for example be a high-end plastic material with a good creep resistance for a durable fixation of the machine sub-assembly despite variations climatic conditions. The receiving part may be a plastic material with mechanical characteristics medium. This last plastic material having a cost lower than the first, we lower the cost price substrate without harming mechanical performance.

Le substrat pourra également présenter une ou plusieurs des caractéristiques suivantes :

  • la matière plastique de la partie de fixation présente une résistance au fluage plus importante que la matière plastique de la partie de réception ;
  • le substrat comprend des conducteurs électriques sur lesquels au moins l'une des matières plastiques est surmoulée ;
  • les conducteurs sont des traces ;
  • la matière plastique de la partie de fixation est par exemple un polysulfure de phénylène ;
  • le sous-ensemble est un porte-balais ;
  • le sous-ensemble est un pont redresseur ;
  • la machine est un alternateur pour véhicule.
The substrate may also have one or more of the following characteristics:
  • the plastic of the fixing part has a higher creep resistance than the plastic of the receiving part;
  • the substrate comprises electrical conductors on which at least one of the plastics is overmolded;
  • the conductors are traces;
  • the plastic of the fixing part is for example a phenylene polysulfide;
  • the sub-assembly is a brush holder;
  • the sub-assembly is a rectifier bridge;
  • the machine is a vehicle alternator.

On prévoit également selon l'invention un sous-ensemble pour machine électrique comportant un substrat selon l'invention.According to the invention, a subset is also provided. for electric machine comprising a substrate according to the invention.

On prévoit en outre selon l'invention une machine électrique, notamment un alternateur de véhicule, comprenant un sous-ensemble selon l'invention. According to the invention, a machine is also provided. electric, in particular a vehicle alternator, comprising a sub-assembly according to the invention.

D'autres caractéristiques et avantages de l'invention apparaítront encore dans la description suivante d'un mode préféré de réalisation donné à titre d'exemple non limitatif. Aux dessins annexés :

  • la figure 1 est une vue en coupe transversale d'un sous-ensemble selon l'invention ; et
  • la figure 2 est une vue analogue montrant le sous-ensemble monté sur une partie de la machine.
Other characteristics and advantages of the invention will become apparent in the following description of a preferred embodiment given by way of nonlimiting example. In the accompanying drawings:
  • Figure 1 is a cross-sectional view of a sub-assembly according to the invention; and
  • Figure 2 is a similar view showing the sub-assembly mounted on a part of the machine.

Le sous-ensemble de la figure 1 est un pont redresseur ou un porte-balais pour alternateur de véhicule automobile. Plus généralement, il pourra s'agir d'un sous-ensemble comportant un ou plusieurs composants électroniques tels que des diodes, des transistors, des plaquettes de circuits imprimés ou des circuits hybrides.The subset of Figure 1 is a bridge rectifier or brush holder for alternator motor vehicle. More generally, it could be a sub-assembly comprising one or more components electronics such as diodes, transistors, printed circuit boards or circuits hybrids.

Le sous-ensemble 2 comporte un substrat 4 présentant une partie 6 de réception d'un ou plusieurs composants électroniques 7 par l'intermédiaire d'une embase 8. Le substrat 4 a une forme générale plate. Il comporte des conducteurs électriques 10, ici sous la forme de traces métalliques, s'étendant dans l'épaisseur du substrat 4 et connectant, au moyen de câblages 12, le composant 7 à un connecteur non représenté du sous-ensemble. Un capot 14 recouvre la partie de réception 6 du composant 7 pour isoler celui-ci de l'extérieur.The sub-assembly 2 comprises a substrate 4 having a receiving part 6 of one or more electronic components 7 via a base 8. The substrate 4 has a generally flat shape. he includes electrical conductors 10, here under the form of metallic traces, extending in thickness of the substrate 4 and connecting, by means of cables 12, the component 7 to a connector (not shown) of the sub-assembly. A cover 14 covers the receiving part 6 of component 7 to isolate it from the outside.

Le substrat 4 présente des parties de fixation 16, telles que des pattes, présentant chacune un conduit 18 s'étendant suivant l'épaisseur du substrat 4. Ces parties 16 sont destinées à recevoir des vis 20 pour la fixation du substrat 4 à un support 22 appartenant à une machine électrique 24 telle qu'un alternateur de véhicule.The substrate 4 has fixing parts 16, such as legs, each having a conduit 18 extending along the thickness of the substrate 4. These parts 16 are intended to receive screws 20 for the fixing the substrate 4 to a support 22 belonging to a electric machine 24 such as an alternator vehicle.

Le substrat 4 est fabriqué par surmoulage sur les traces métalliques 10 d'une première matière plastique définissant la partie de réception 6, et d'une deuxième matière plastique, différente de la première, définissant les seules parties de fixation 16. Les deux matières plastiques peuvent être comoulées ou moulées l'une sur l'autre successivement. On choisit pour la première matière plastique un matériau peu coûteux ayant des caractéristiques mécaniques moyennes. Pour la deuxième matière plastique, on choisit une matière plastique haut de gamme telle qu'un polysulfure de phénylène, ayant une excellente tenue au fluage. Ainsi, après serrage des vis 20, les parties de fixation 16 se trouvent comprimées entre les têtes de vis et le support 22. Avec le temps, cette compression demeure sensiblement inchangée en dépit de variations climatiques, ce qui assure la pérennité du serrage des vis 20.The substrate 4 is produced by overmolding on the metallic traces 10 of a first plastic material defining the receiving part 6, and a second plastic, different from the first, defining the only fixing parts 16. Both plastics can be co-molded or molded one on the other successively. We choose for the raw material an inexpensive material having average mechanical characteristics. For the second plastic material, we choose a material high-end plastic such as polysulfide phenylene, having an excellent creep resistance. So, after tightening the screws 20, the fixing parts 16 are compressed between the screw heads and the support 22. Over time, this compression remains substantially unchanged despite variations climatic conditions, which ensures the long-term tightening of screw 20.

On pourra modifier la forme du substrat 4. On pourra employer pour le réaliser au moins trois matières plastiques différentes.We can modify the shape of substrate 4. We can use at least three materials to make it different plastics.

Claims (10)

Substrat (4) pour un sous-ensemble (2) de machine électrique, présentant une partie (6) de réception d'un composant électronique (7), réalisée en matière plastique, et une partie de fixation (16) du substrat à la machine, réalisée en matière plastique, caractérisé en ce que les matières plastiques des parties de réception (6) et de fixation (16) sont différentes.Substrate (4) for a subset (2) of electric machine, having a part (6) of reception of an electronic component (7), carried out in plastic material, and a fixing part (16) of the machine-made substrate, made of plastic, characterized in that the plastics of the receiving (6) and fixing (16) parts are different. Substrat selon la revendication 1, caractérisé en ce que la matière plastique de la partie de fixation (16) présente une résistance au fluage plus importante que la matière plastique de la partie de réception (6).Substrate according to claim 1, characterized in that the plastic of the fixing part (16) has a higher creep resistance than the plastic of the receiving part (6). Substrat selon la revendication 1 ou 2, caractérisé en ce qu'il comprend des conducteurs électriques (10) sur lesquels au moins l'une des matières plastiques est surmoulée.Substrate according to claim 1 or 2, characterized in that it includes conductors electrical (10) on which at least one of the plastic is overmolded. Substrat selon la revendication 3, caractérisé en ce que les conducteurs (10) sont des traces.Substrate according to claim 3, characterized in that the conductors (10) are traces. Substrat selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la matière plastique de la partie de fixation (16) est un polysulfure de phénylène.Substrate according to any one of claims 1 to 4, characterized in that the material plastic of the fixing part (16) is a phenylene polysulfide. Substrat selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le sous-ensemble (2) est un porte-balais.Substrate according to any one of Claims 1 to 5, characterized in that the sub-assembly (2) is a brush holder. Substrat selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le sous-ensemble (2) est un pont redresseur.Substrate according to any one of Claims 1 to 5, characterized in that the sub-assembly (2) is a rectifier bridge. Substrat selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la machine est un alternateur pour véhicule.Substrate according to any one of Claims 1 to 7, characterized in that the machine is a vehicle alternator. Sous-ensemble (2) pour machine électrique, caractérisé en ce qu'il comporte un substrat (4) selon l'une des revendications 1 à 8. Sub-assembly (2) for electric machine, characterized in that it comprises a substrate (4) according to one of claims 1 to 8. Machine électrique, notamment alternateur de véhicule, caractérisée en ce qu'elle comprend un sous-ensemble (2) selon la revendication 9.Electric machine, in particular alternator vehicle, characterized in that it comprises a sub-assembly (2) according to claim 9.
EP99400851A 1998-04-09 1999-04-08 Substrate for a subassembly of electronic components of an electric machine Expired - Lifetime EP0949745B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9804449 1998-04-09
FR9804449A FR2777398B1 (en) 1998-04-09 1998-04-09 SUBSTRATE FOR A SUB-ASSEMBLY WITH ELECTRONIC COMPONENT OF ELECTRIC MACHINE

Publications (2)

Publication Number Publication Date
EP0949745A1 true EP0949745A1 (en) 1999-10-13
EP0949745B1 EP0949745B1 (en) 2004-08-11

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EP99400851A Expired - Lifetime EP0949745B1 (en) 1998-04-09 1999-04-08 Substrate for a subassembly of electronic components of an electric machine

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EP (1) EP0949745B1 (en)
DE (1) DE69919259T2 (en)
ES (1) ES2226302T3 (en)
FR (1) FR2777398B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2969899A1 (en) * 2010-12-23 2012-06-29 Valeo Sys Controle Moteur Sas PRINTED CIRCUIT WITH INSULATED METAL SUBSTRATE
US10332818B2 (en) 2017-01-26 2019-06-25 At&S Austria Technologie & Systemtechnik Aktiengesellschaft Efficient heat removal from component carrier with embedded diode

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849838A (en) * 1972-02-18 1974-11-26 Itw Ateco Gmbh Devices for fastening the casing of a semiconductor component to a mounting plate
EP0210090A1 (en) * 1985-06-24 1987-01-28 Ducellier Et Cie Alternator for automotive vehicles or the like
EP0312802A2 (en) * 1987-09-24 1989-04-26 Elastomeric Technologies, Inc. Self-mounted chip carrier
DE4233679C1 (en) * 1992-10-07 1993-12-02 Albrecht Knorpp Multifunctional terminal block for electrical machine - has conductor paths, contact elements and electrical components sandwiched between two half shells or insulating plate
DE9212744U1 (en) * 1992-09-22 1994-01-27 Bosch Gmbh Robert Three-phase generator for motor vehicles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849838A (en) * 1972-02-18 1974-11-26 Itw Ateco Gmbh Devices for fastening the casing of a semiconductor component to a mounting plate
EP0210090A1 (en) * 1985-06-24 1987-01-28 Ducellier Et Cie Alternator for automotive vehicles or the like
EP0312802A2 (en) * 1987-09-24 1989-04-26 Elastomeric Technologies, Inc. Self-mounted chip carrier
DE9212744U1 (en) * 1992-09-22 1994-01-27 Bosch Gmbh Robert Three-phase generator for motor vehicles
DE4233679C1 (en) * 1992-10-07 1993-12-02 Albrecht Knorpp Multifunctional terminal block for electrical machine - has conductor paths, contact elements and electrical components sandwiched between two half shells or insulating plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2969899A1 (en) * 2010-12-23 2012-06-29 Valeo Sys Controle Moteur Sas PRINTED CIRCUIT WITH INSULATED METAL SUBSTRATE
US10332818B2 (en) 2017-01-26 2019-06-25 At&S Austria Technologie & Systemtechnik Aktiengesellschaft Efficient heat removal from component carrier with embedded diode

Also Published As

Publication number Publication date
ES2226302T3 (en) 2005-03-16
FR2777398A1 (en) 1999-10-15
EP0949745B1 (en) 2004-08-11
DE69919259T2 (en) 2005-09-08
DE69919259D1 (en) 2004-09-16
FR2777398B1 (en) 2004-04-02

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